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A sensing element, fitted inside the housing and in
contact with the shroud support.
Note : The probe is spring-loaded to ensure permanent contact with the shroud support.
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Engine oil temperature.
The engine is equipped with 2 oil temperature sensors.
One of the sensors, the TEO sensor, provides a temperature value used for the Integrated Drive Generator (IDG) oil cooling system and the FRV.
The TEO sensor is installed on the oil supply line to the forward sump, at the 9 o’clock position, above the oil tank.
It has a captive nut in order to secure it to the supply line.
The TEO provides two identical electrical outputs proportional to the supply oil temperature. A single electrical connector routes the outputs to the ECU.
The second sensor is installed on the lube unit, and is described in the oil system section.
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Pressure signals.
Various pressures, picked-up at specific aerodynamic stations, provide the ECU with information for engine control, or monitoring.
Air pressures are sent to the shear plate of the ECU by pressure lines, which are drained at their lowest part by weep holes.
The shear plate routes the pressures to the channel A and B transducers, which compute the actual pressures.
The transducers are quartz capacitive types and the vibration frequency of the quartz element varies with the stress induced into the element by the air pressure.
The computation of this frequency with temperature compensation, determines the corrected pressure value.
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ENGINE SYSTEMS Jan 03
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ENGINE SENSORS
Ambient static pressure P0. Engine inlet static pressure PS12.
This value is used by the ECU, in case of lost signals Three static pressure ports are mounted on the forward from the Air Data Computer (ADC). section of the fan inlet case, at the 12, 4 and 8 o’clock
positions. The P0 air pressure is measured through a vent plug, installed on the ECU shear plate. A pneumatic line runs around the upper portion of the fan
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